2 Level 4 monsters When your opponent activates a card or effect (Quick Effect): You can detach up to 3 different types of materials from this card, then apply the following effect(s) depending on what was detached. • Monster: This card gains 400 ATK. • Spell: Take control of 1 face-up monster your opponent controls until the End Phase, but it cannot declare an attack or activate its effects this turn. • Trap: Negate the effects of 1 Effect Monster on the field until the end of this turn. You can only use this effect of "Time Thief Double Barrel" once per turn.